> We should share unit tests, not one-line libs.
Most of the small libs I've shared are mainly sharing unit tests.
Here's a function I've shared on npm:
var kind = function(item) {
var getPrototype = function(item) {
return Object.prototype.toString.call(item).slice(8, -1);
};
var kind, Undefined;
if (item === null ) {
kind = 'null';
} else {
if ( item === Undefined ) {
kind = 'undefined';
} else {
var prototype = getPrototype(item);
if ( ( prototype === 'Number' ) && isNaN(item) ) {
kind = 'NaN';
} else {
kind = prototype;
}
}
}
return kind;
};
The tests:
suite('kind', function(){
test('shows number-like things as numbers', function(){
assert(avkind(37) === 'Number');
assert(avkind(3.14) === 'Number');
assert(avkind(Math.LN2) === 'Number');
assert(avkind(Infinity) === 'Number');
assert(avkind(Number(1)) === 'Number');
assert(avkind(new Number(1)) === 'Number');
});
test('shows NaN as NaN', function(){
assert(avkind(NaN) === 'NaN');
});
test('Shows strings as strings', function(){
assert(avkind('') === 'String');
assert(avkind('bla') === 'String');
assert(avkind(String("abc")) === 'String');
assert(avkind(new String("abc")) === 'String');
});
test('shows strings accurately', function(){
assert(avkind(true) === 'Boolean');
assert(avkind(false) === 'Boolean');
assert(avkind(new Boolean(true)) === 'Boolean');
});
test('shows arrays accurately', function(){
assert(avkind([1, 2, 4]) === 'Array');
assert(avkind(new Array(1, 2, 3)) === 'Array');
});
test('shows objects accurately', function(){
assert(avkind({a:1}) === 'Object');
assert(avkind(new Object()) === 'Object');
});
test('shows dates accurately', function(){
assert(avkind(new Date()) === 'Date');
});
test('loves Functions too', function(){
assert(avkind(function(){}) === 'Function');
assert(avkind(new Function("console.log(arguments)")) === 'Function');
assert(avkind(Math.sin) === 'Function');
});
test('shows undefined accurately', function(){
assert(avkind(undefined) === 'undefined');
});
test('shows null accurately', function(){
assert(avkind(null) === 'null');
});
});